burns



J. BURNS. MACHINE FOR ADDING NUMBERS.

No. 21,243. Patented Aug. 24, 1858.

Ida:

UNITED STATES PATENT orrron.

J. BURNS, OF NEW YORK, N. Y.

ADDOMETER.

Specification of Letters Patent No. 21,243, dated August 24, 1858.

To all whom it may concern:

Be it known that I, JABEZ BURNS, of the city, county, and State of NewYork, have invented an Improved Machine for Adding Numbers; and I dohereby declare the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming partof this specification, in which Figure 1, is a front View with the frontplate removed to show the gearing which it covers. Fig. 2, is atransverse vertical sectional view of the same. Fig. 3, is a front viewof one of the sections of the machine with its attached gearing.

Similar letters of reference indicate corresponding parts in the severalfigures.

The nature of my invention consists in the toothed wheels 1 1 1 1 whenarranged in the particular manner described relatively to the arc indexplates, in combination with the toothed wheels of the registering indexcylinders, and with the stop, whereby the same teeth which actuate thewheels of the registering cylinder can be used as a means whereby toalways turn the wheels the proper distance to accomplish any requiredmovement of the registering cylinders. This arrangement renders themachine very simple and compact, as keys, levers and other devices foractuating the mechanism are dispensed with.

My invention consists, 2nd, in the particular arrangement, incombination with the above, of pins on the sides of the finger wheels,intermediate toothed segments, and pins on the sides of the registeringcylinders for the purpose of giving a tenth part of a revolution to aregistering cylinder of a higher denomination, when one registeringcylinder completes is revolution as set forth.

A, B, C, D, is a box consisting of two end pieces A and B, of wood ormetal and a back plate C, and front plate D, of metal. The shape of theend pieces A and B of this box is represented by the external profile ofFig. 2, which figure also represents the transverse form of the frontand back plates. The front and back plates 0, and D, are straight andparallel longitudinally.

E, is a fixed spindle extending from end to end of the box and carryingthe register wheels (4 a a a, a which are fitted to turn freely on thesaid spindle. The peripheries of these register wheels are severallydivided into ten equal parts numbered 0, 1, 2, &.c., to 9. Every one ofthe said register wheels except the last one a at the left hand end ofthe machine has secured to it one of a series of spur wheels 6 Z2 b 5*,each of which has ten teeth, and every one of the said registeringwheels except the first one a has on its right hand side ten pins 0, 0,arranged at equal distances apart in a circle concentric to the axis.Opposite to each register wheel there is a hole (Z, in the front plateD, large enough to expose to view one of the numerals on the peripheryof the register wheel, the said holes (Z, (Z being all in the samehorizontal line as is illustrated in Fig. 1, by the representation ofthe said holes in red outline, the plate D being omitted in that figureto expose the register wheels and gearing. In order to prevent thestoppage of the register wheels in any position except wit-h one oftheir numerals opposite the respective opening (Z, a stop spring, 6, isapplied in the manner represented in Fig. 9., to each of the spur wheels6 I2 6 Z2 and to the series of pins, 0, 0, of the last index wheel (P,which has no spur wheel attached. The register wheels are kept at equaland proper distances apart by loose collars f, f, on the spindle or bybeing furnished with hubs.

F F F F F are a series of slabs of wood or plates of metal correspondingnearly in form with the ends A and B of the box, except that they arecut away in front to make room for the register wheels, andcorresponding in number with the said wheels, the two endmost of thesaid slabs or plates being bolted or otherwise attached to the ends Aand B of the box and the others being kept at proper distances apart byblocks G, G, G, G, placed between their lower parts. To these blocks thesprings e, e, are secured.

H is a screw bolt passing longitudinally through the box and through theslabs or plates F &c., and through the blocks G, and holding the saidslabs or plates and blocks and the ends of the box in place and g, g,are screws passing through overhanging lips h, h, at the top of the backplate C and screwing into the plates or slabs F &c., to hold the upperparts of the said slabs or plates at proper distances apart.

P, I 1 1*, are spur toothed wheels which I will call finger wheels of apitch corresponding with and gearing with the spur wheels 6 b b 6 havingthirty teeth the spaces bet-ween which are wide enough and deep enoughto admit the point of a persons finger as shown at p, p, in Fig. 2, the

said wheels being fitted to rotate on screws 2' 2' 2' 2' which attachthem respectively to the left hand sides of the slabs or plates F F F FThe are formed front portions of the said slabs or plates constitutingthird parts of circles are faced with index plates J ,J J, J, dividedinto ten equal parts numgered 0, 1, 2, &c., to 9. Commencing at thebottom, the said numbers being opposite the spaces between the teeth ofthe large spur wheels I I I I At the bottom of the index plates there isa ledge j, extending all across the front of the machine to serve as astop to the operators finger in operating the machine.

70 70 70 Z0 are wheels having each three teeth fitted to rotate onscrews n, n, by which they are attached to the right hand sides of theslabs or plates F F, F, F in a position to gear with the pins 0, c, ofthe register wheels a a a a and Z Z Z Z are pins attached to the lefthand sides of the large spur wheels, three to each wheel at equaldistances apart in the same circle concentric to the axis of the wheel,the said teeth being arranged to act upon the teeth of the wheels 1 0 7070 k and the latter wheels being arranged so that when one of theirteeth is moved by one of the said pins it shall act upon one of the pins0, c, to give the corresponding register wheel one tenth of arevolution. The arrangement of the gearing is such that when either ofthe register wheels has its 0 opposite to its respective hole, (Z, inthe front plate D, one of the pins Z Z Z or Z on the finger wheel,gearing with it, will be just below its respective wheel A2 70 70 70 andwill not come into operation on the lattertill the finger Wheel turningin the direction of the arrows shown on I in Fig. 1, moves a distanceequal to ten of its teeth.

The operation of adding numbers by the machine is as follows: In simpleaddition of whole numbers the wheels I and a constitute unit wheels,those I a tens wheels those I (4 hundreds wheels and so on; but in theaddition of amounts in centesimal or dollar and cent currency the WheelsI a represent cents, I a tens of cents, I a units of dollars, 1* a tensof dollars and so on. The addition may be performed by first adding allthe numbers in the first column to the right hand and then adding allthe numbers in the ohter columns in the same manner one after the other,or the amounts may be added one after another, commencing with the firstfigure and then proceeding with the second, afterward with the third andso on, when the amount is represented by more than one figure. I willfirst describe the first mentioned method of operation. First set allthe register wheels with their Os, opposite the openings (Z, d, in thefront plate D, which should be done by turning the finger wheels,commencing at the left hand, but it will be more convenient to turn thembackward or in the opposite direction to the arrows shown in Fig. 2.Then place the finger in the space or notch in the wheel I opposite thenumber on the contiguous index plate J, which corresponds with the firstnumber in the column to be added and draw down the wheel till the fingercomes to the stop j, as shown in red color in Fig. 2, where it isarrested and becomes itself a stop to the tooth above it and preventsthe further movement of the wheel. The finger wheel I gives motion tothe spur wheel 6 attached to the register wheel a and which representsthe number to be registered opposite to its respective opening d. Thefinger is next placed in the same manner in the space or notch of thewheel I opposite to the number on the index J, corresponding with thenext number in the column, and drawn down to the rest 7', and theregister wheel is thereby again moved a corresponding distance. If thesum of the two numbers then added be equal to or more than ten andconsequently cause the revolution of the register wheel a to becompleted one of the pins Z comes into operation on a tooth of the wheeland causes the said tooth to act upon one of the pins 0, c, of theregister wheel a", and thereby imparts to the said index wheel one tenthpart of a revolution, which brings the numeral of that index wheel insight. A similar movement of the wheel a is produced in the same mannerevery time the revolution of a is completed. All the numbers in thefirst columns are proceeded with in the same manner on the wheel I andthen those in the next column are added by operating in a similar manneron the finger wheel I which gears with and moves the index wheel a Everytime the latter register wheel completes a revolution one of the pins Zon the wheel I, acts upon a tooth of the wheel 70 which is thus causedto act on one of the pins 0 of the register wheel a and causes it tomake a tenth of a revolution. In the samemanner the several columns areadded in succession, always changing from one finger wheel to the nextat the left hand for a new column, and throughout the whole operationwhenever a register wheel completes a revolution a pin Z Z Z .or Z onthe corresponding finger wheel comes into operation on one of the wheels70 Z0 7: is, and thus gives to the next register wheel one tenth of arevolution. It should be observed that the action of the pins Z Z Z Zand wheels [6 70 70 70 always takes place while the numeral 9 on theregister wheel corresponding with the finger wheel carrying theoperating pin is moving away from and the 0 moving to- Ward its opening(Z.

The sum of the amount or quantities added is seen through the openings(Z, (Z, as illustrated in Fig. 1, where the number added is 621 or 6,21. The other method of operation only diifers inasmuch as all thefigures in one line are registered or added before commencing on thenext line, the operator proceeding from the units or smallestdenominations to the highest ones, commencing on the first wheel 1 andproceeding from one wheel to another from right to left.

Either of the above methods of operation may be commenced at the lefthand with the numbers of the highest denomination and this latter willin some cases, for instance in the addition of numbers not written down,he the most convenient.

This machine possesses advantages over others for the same purpose inbeing more simple in its construction, in permitting the operation to bechanged from one wheel to another without shifting or adjustment of anyof the parts, and in the facility for taking it apart to repair ifnecessary and putting it together again. The facility for taking apartand putting together is owing to the attachment of the finger wheels andwheels 70 70 76 70 to separate slabs or plates applied as described,which provides the whole machine to be taken to pieces by removing thebolt H, and screws 9, and taking out the screws which screw the frontand back plates to the left hand end piece A, when all the shafts orplates except F which does not require to be removed, can be taken outand register wheel spindle and all the register wheels can be taken off.This description of the method of taking the machine apart explains themethod of putting it together.

It is obvious that in these machines the system of register wheels andgearing may be continued indefinitely.

lVhat I claim as my invention and desire to secure by Letters Patent, is

l. The toothed wheels 1 I 1 1 when arranged in the particular mannerdescribed relatively to the arc index plates J, in combination with thetoothed wheels 5 6 Z2 11*, Z1 of the registering cylinders, a a a a a,and stop 7', substantially as and for the purposes set forth.

2. The particular arrangement, in combination with the above of pins Z,Z, Z, Z, on the sides of the finger wheels .1 I", I I", toothed segments70 3 k is", a and pins 0, on the sides of the registering cylinders (4 aa a, (0 for the purpose set forth.

JABEZ BURNS.

\Vitnesses Var. TUscH, WV. HAUrr.

